Ontario
Trail Running Calendar Ontario 2026-2027
Explore the best trail runs in Ontario for 2026-2027! Our updated list features 118 exciting trail runs across the region. Find your next trail run in Ontario below and join the trail community at these great events!
August 2026
Two day 5K obstacle run in Uxbridge late August 2026 featuring foam, an inflatable waterslide, mud pits, a kids zone and a festival area.
An obstacle race in Cloyne Ontario on August 29 2026 featuring a 3 km loop, a kids challenge and a 2 hour Endure to complete as many loops as possible. The event includes a festival area, food vendors and cash prizes.
24 Hour To Empower in Barrie features 5 km loops each hour for 24 hours to reach 120 km while raising funds for the Women & Children's Shelter of Barrie.
Trail races of 3.25 km and 8 km take place in Exeter on August 30, 2026 with proceeds supporting trail maintenance.
Raid the City is a three hour urban adventure run for teams of two in Hamilton. Teams use maps and a smartphone app to score checkpoints across trails, roads, alleys and parks while travelling on foot.
September 2026
Trail running event in Thunder Bay organized by Thunder Bay Nordic Trails and Fresh Air, with cash-on-site entry and on-site number pick-up. A free Kids Mini Fun Run follows the main race.
Trail running event at Albion Hills Conservation Area on September 5, 2026 offering multiple course categories and kids races.
Trail running at Albion Hills with three course distances, on-course aid, riverside camping and pool facilities.
Trail races at Camp Fortune in Gatineau Park featuring 20K UTMB Index race, 10K, 5K and a 2K kids run with chip timing and a prize purse for the 20K.
The Haliburton Forest Trail Race marks its 33rd year in 2026. Participants can run distances from 12K to 100 miles on the rugged, wooded trails of a private forest reserve.
Trail race weekend in Tobermory on September 12 and 13 2026 offering distances from 5 km to 42 km and a boat transfer for the 5k.
A road and trail event on September 12, 2026 featuring 5 km, 10 km, a half marathon and a free 1-mile kids race along Lake Nipissing and the Kate Pace Way, with part of registrations donated to YMCA Fill The Bus.
Tough Mudder Toronto at Gopher Dunes on September 12, 2026 features 5K and 15K obstacle courses, spectator passes, group packages and finisher rewards.
Backyard Ultra at Woodbine Beach Park with 6.71 km loops, an hourly elimination format, a 15-hour endurance option, and a one-Yard community waterfront run.
A family oriented obstacle challenge in Mississauga with courses for adults, children and dogs at the Paramount Fine Foods Centre.
Spartan obstacle races at Gopher Dunes near Courtland ON on Sep 13, 2026 featuring a 5 km sprint with 20 obstacles and a 10 km super with 25 obstacles.
Trail 5 km at Bechtel Park on September 13, 2026, chip timed with reusable chips and minimal extras, free for Run Waterloo members.
A community run among the vines at Palatine Hills Estate Winery with a timed 5 km race, 1.25 km family routes and a dog walk, followed by food, drink, live music and awards.
A trail running event in Thunder Bay on 15 September 2026 organised by Thunder Bay Nordic Trails and Fresh Air. Proceeds support a legacy fund and a free Kids Mini Fun Run follows the main event.